Seismic Q of the lunar upper mantle
Article first published online: 20 SEP 2012
Copyright 1982 by the American Geophysical Union.
Journal of Geophysical Research: Solid Earth (1978–2012)
Volume 87, Issue B6, pages 4855–4861, 10 June 1982
How to Cite
1982), Seismic Q of the lunar upper mantle, J. Geophys. Res., 87(B6), 4855–4861, doi:10.1029/JB087iB06p04855., and (
- Issue published online: 20 SEP 2012
- Article first published online: 20 SEP 2012
- Manuscript Accepted: 12 MAR 1982
- Manuscript Received: 2 SEP 1980
We have determined the frequency dependence of anelastic attenuation for both P and S waves in the upper mantle of the moon in the frequency range of roughly 3 to 8 Hz. The method used is a combination of a single-station method, in which Q−1 is obtained as an integral with an unknown constant, and a multiple-station method, the result of which is used to determine the integration constant. The Q determined for P waves (Qp) appears to decrease with increasing frequency, though it is not significantly different from a constant Q, while the Q for S waves (Qs) increases with frequency, becoming significantly greater than Qp at high frequencies. All Q values remain greater than 4000 within this frequency range. Qs above 5 Hz is approximately proportional to the 0.7th power of frequency. The high Q for shear waves at high frequencies suggests that compressional heat loss may be a dominant dissipation mechanism. Some uncertainties in the absolute Q values remain because the detailed velocity structure of the lunar upper mantle is largely unknown.